Squitten

Squitten is a portmanteau word derived from the words squirrel and kitten, it is a term used to describe a deformed cat with unusually short forelegs or unusually long hindlegs that resembles a squirrel[1]. It is an example of a cat body type genetic mutation.

More rarely, the term Kangaroo Cat is used; this derives from a 1953 specimen known as the Stalingrad Kangaroo Cat[2].

Source : http://en.wikipedia.org/wiki/Squitten